Adjustable caster-cup



E. H. BERG.

ADJUSTABLE CASTER CUP. APPLICATION FILED `ocT.22.'I92o.

1,389,572. PatendSept. 6, 1921.

,II IIIIIII UNITED STATES EDWARD BERG, F MINNEAPOLIS, MINNESOTA.

ADJUSTABLE CASTER-CUP.

Specification of Letters Patent.A

Patented sept. c, 192i.

Application filed October 2 2, 1920. Serial No. 418,763.

To all whom t may concern .j

Be it known that I, EDWARD I-I. BERG, a

citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Adjustable Caster-Cups; and I do hereby declare the following to be a full, clear, and exact de- Y scription of the invention, such as will en- .heavy dressers, chiffonniers, or phonograph able others skilled in the art to which it appertains to make and use the same.

This invention relates to a caster cup and is particularly designed to providean ad# j ustable support for the casters used on furniture legs or supports. It is well known that frequently, only three of the legs will support a piece of furniture, or other article, leaving one or more legs out of contact with the floor or other supporting surface. This results in great and unequal stresses being placed upon the furniture, especially if the same has considerable weight. It often happens that articles of furniture, such as cabinets which are composed of sectional and veneered parts, are seriously cracked and damaged on account of these stresses set up by the imperfect support.

One object of this invention is to provide a caster support, by-means of which all the legs supporting a phonograph cabinet, or other heavy piece of furniture, may equally bear the weight thereof.

It is another object of the invention to provide such a device of great simplicity which can be easily made and easily applied to its intended use.

Other objects of the invention will appear as the description proceeds in connection with the acompanying drawings in which like reference characters refer to the same parts throughout the different views, and in which Figure 1 is a central vertical section through the caster cup showing a portion of the supporting leg and caster supported thereby article of furniture, or other `object having at its lower end the usual caster comprising the support 2 and the roller or ball 3'. This caster is supported upon a cylindrical. member having a closed upper portion 5 formed as a spherical or semi-spherical receptacle. A cylindrical member ais open at its other end and has threads 6 formed on its interior. These threads are adapted to engage with similar threads 7 formed on the exterior of a supporting cup member 8 closed at its bottom to form a base 9. A piece of felt,A or similar material 1() is glued or otherwise secured to the bottom of member 8 to form a support .which will not mar or scratch the nished surface ofa floor, or other supporting means.

In Fig. 2, a similar caster support is shown, but the caster member 2, in this figure, is internally threaded to be screwed upon a sleeve 11 similarly threaded, and which is tightly secured to the leg member 1.

In Fig. 3 is shown a caster support similar to those shown in Figs. land 2, but a different type of caster is illustrated. This particular caster comprises a wheel 12 carried on a pivot 13 extending between depending arms 111 which are carried by the sleeve 2. As shown in Fig. 2, the sleeve 2 also engages the threaded sleeve 11 rigidly'secured to the leg member 1.

Fig. 4: discloses an adjustable type of caster similar to that shown in Fig. 2. The ball 3 of which is shown as in direct contact with the floor, or other supporting surface.

The use or operation of the device will be readily understood. The caster supporting member will be inserted under the casters on the various legs of the` article to be supported. If one or more of the legs are not in contact with the support the sleeve 4 will be turned upon the member 8 and suitably adjusted so that the caster will firmly bear upon the same and be supported thereby. In this manner, the weight of the piece of furniture, or other object, can be made to be equally distributed on the various legs. The setting up of damaging stresses in the supported object is thus avoided.

ile any suitable material may be used in making the device, it can be cheaply and ornamentally made of steel having its surface oxidized. The felt or other material on ported object will, on the contrary, be etliciently and firmly supported in one position. The size of the device will,r or' course, be made to best suit the size of the supporting legs and that of the furniture.

It will, of course, be understood that various changes in form, design and details of the device may be made Without departing from the scope of applicants invention, which, generally stated, consists of the matter shown and described and set forth in thev 2. A caster support having in combination a base member and a casterl supportingmember adjustably mounted thereon, said supporting member having its upper surface formed as a concave caster Vsupporting recep-V tacle.

3. A caster support having in combination a cylindrical base member having screw threads on its exterior service, a supporting sleeve having screw7 threads on its interior surface adapted to engage With the threads on said Vbase member, and having its upper end formed as a caster support.

4L. A caster support having in combination a'base member formed as a hollow cup, a felt member of equal diameter secured to the loiver face thereof, the sides of the cup having screw threads formed thereon and an inverted cup member` having screw threads i on its interior adapted to engage the threads on said first mentioned cup member, having its upper surface formed with a semi-spherical cavity.

5. The combination with" a leg member and caster carried thereby, of a caster supportingmember comprisng a base formed as a cylindrical cup, a layer of felt secured to the bottom thereof, screw threads formed on the exterior of the cup, and a cylindrical member havingr a closed top portion and having screiv threads on its interior adapted to engage said threads on the cup, the said top portionbeing formed as a semi-spherical receptacle to support the caster.

In testimony Whereofl ax my signature EDVARD H. BERG. 

